Mold for metal-concrete construction.



PATENTED MAY 10, 19,04.

C. WEBER. MOLD POR METAL CONCRETE CONSTRUCTION.

APPLICATION FILED JUNE 29. 1903.

3 SHEETS-SHEET 1.

NO MODEL.

No. 759,573. PATENTED MAY 10, 1904.

C. WEBER.

MOLD FOR METAL CONCRETE CONSTRUCTION. APPLIUATION FILED JUNE 2s. 190s.

H0 MODEL.

3 SHEETS-SHEET 2.

mg mums Farms co. Pnorouwmwmumsmn, n` nv No. 759,573. PATBNTBD MAY10,1904. o. WEBER.

MOLD FOR METAL GGNGRETE CONSTRUCTION.

APPLIUATION PILED JUNE ze. 100s.

N0 MODEL. 3 SHEETS-SHEET 3.

Patented May 1o, 1904.

PATENT CEEICE.

CARL YVEBER, OFCHICAGC, ILLNCIS.

MOLD FOR METAL-CONCRETE CONSTRUCTION.

SPECIFICATIO forming part of Letters Patent N0. 759,573, dated May 10,1904:.

Application filed June 29, 1903. Serial No. 163,461. (No model.)

.To all wil/07M, 711; may concern:

Be it known that 1, CARL WEBER, a citizen of the United States, residingat Chicago, in the county of Cook and State of Illinois, have invented anew and useful Improvement in Molds for Metal-Concrete Construction, ofwhich the following is a specification.

My invention relates to an improvement in the molds for use in theerection of structures such as chimneys, stand-pipes, watertowers, andthe like, composed of a framework of structural metal beams embedded inconcrete. ln the erection of sucha structure it is common to employ inits progress both outside and inside scaffoldingl for access of thelaborers to the work. This tends to complicate the work and adds to thecost.

The primary object of my invention is to enable the outer scaffolding tobe dispensed with by providing for molding the concrete in sectionsabout the framework, a construction of mold adapting it to be readilyremoved after a section has been molded and to bc as readily raised andadjusted upon that section into position for molding the next succeedingsection, th is procedurebein g repeated throughout the erection. Themethod involved in the procedure thus outlined forms the subject of myapplication for a United States Patent therefor filed concurrentlyherewith on the 29th day of June, 1903, Serial No. 163,462.

My invention consists in the construction of the mold I have devised foraccomplishing the aforesaid object.

Referring to the accompanying drawings, Figure l shows bya broken Viewin elevation two of my improved molds in use on a chimney undergoingerection. Fig. 2 is a section taken on the irregular line 2 on Fig. 1and Viewed iu the direction of the arrow; Fig. 3, a section taken at theline 3 on Fig. 1 and viewed in the direction of the arrow; Fig f1, aperspective View of an outer mold-section; Fig. 5, a broken view inelevation showing parts of two adjacent outer mold-sections with thelatch device for releasably locking them together, and Fig. 6 a similarview showing parts of two adjacent inner mold-sections with theirreleasably-locking latch device.

A is the outer mold, and B is the innermold,

both being of the same general construction.- that is to say, formed ofa plurality of segmental sections releasably locked together, though theouter mold being of greater diameter than the inner one, contains thegreater number or greater length of sections. Fig. A shows a section, A,of the outer mold in the form of a segment of the circle described bythe complete mold to cause it to conform to the circular shape incross-section of a chimney C being' erected. Each mold-section ispreferably formed of wood, though it maybe formed of any other suitablematerial, and comprises a substantial frame a of required shape, havingfastened to one side matched boards forming an unbroken facing of',which projects below the lower frame member, as represented at e. Cn theouter side of the frame near each corner at one end of the mold sectionis fastened a catch c, crossed by a guard serving the purposehereinafter described and comprising a bar 7), fastened at its ends tobearings b', projecting from the upmold, and it also applies to eachsection B' of the inner mold B, except that the catches c on eachmold-section B are shown in the form of loops, and the latches a'thereon have tongues a depending from them to enter the loops, thoughthese differences are not material.

To employ my improved construction of mold in the erection of a roundchimney C after the foundation (not shown) is laid, the frame structurel), Fig. 1, comprising upright T-barsf, rising from the foundation incircular series encircled at intervals by similar bars f in annularform, is erected for a portion of the structure. About the base of theframework the outer mold A is adjusted by placing sections A end wisetogether and lock- TOO ing them from one to the other by engaging thelatches Z on each with the catches c on the one next adjacent thereto,and the inner mold B is adjusted inside the framework by placingsections B endwise together and locking them from one to the other byengaging the latches CZ on each with the catches c on the one nextadjacent thereto. The meeting edges of two of the sections of the innermold are oblique, as shown at t in Fig. 3, to facilitate the adjustmentof the sections and dismemberment of the mold, as hereinafter described.The distance apart of the molds is according to the thickness desired ofthe wall of the structure, and of course the relative diameters of themolds are proportioned accordingly. lVith the inner and outer moldsforming the first set thereof adjusted on the foundation, as described,the space between them is filled with concrete g about the portion ofthe framework between the molds, whereby the beams are embedded in theconcrete. When the concrete has set, another similar set of molds A Bare adjusted in the manner described of the lowermost set upon thelatter, the upper edges of which receive and overlap the lower edges ofthe superimposed molds at their extensions fu, and the space betweenthese molds is filled with concrete g. Then that concrete becomes set,the hanger e on each section of both lowermost molds is raised andcaught on a suitably-placed hook or holder, whereupon the latches of allthe sections are disengaged from their respective catches and thesections sepa rate or become readily separable, but cannot fall apart,because of being held against falling by suspension on the hangers e.The laborers who work on a suitable scaolding (not shown) inside thechimney C as the erection thereof progresses raise the mold-sections bytheir hangers on top of the molds last placed and adjust them on thelatter in the manner already described of adjusting' the second set ofmolds on the lowermost set thereof. The space between the newly-adjustedmolds is then filled with concrete g, and when it becomes set the moldsof the then lowermost set are dismembered while their sections aresuspended, and these sections are for use on the last-finished portionof the structure and repeating this operation, for which only two setsof molds are required, until the erection is completed, which may alsoinvolve splicing further lengths of the beams f to the upper ends ofthose embedded and encircling these upright extensions at intervals withannular beams f The guards b shield the latches Z against being engagedby the mold-sections being raised past them and dislodged thereby fromthe catches.

As will be seen, by the use of my improved construction of mold the workof erection may be performed expeditiously and cheaply with the use ofscaffolding only on one side (preferably the inner side) of thestructure.

Vhen a lowermost mold has been removed, the mold above it requires noother support than is afforded by its adherence to the concrete surface,as has repeatedly been demonstrated by me in the practice of myinvention, that support being very much greater than is necessary forholding the mold in place.

That I claim as new, and desire to secure by Letters Patent, is i l. Aset of molds for the erection, substantially as described, of structurescomposed of framework of structural metal beams embedded in concrete,said set comprising an outer mold composed of a series of sections eachformed of a frame provided with a continuous facing extending beyond itslower end, with means for releasably locking it to adjacent sections anda hanger fastened to the mold-section to be raised and lowered thereonand affording the medium by which to suspend the section preparatory toraising it, and an inner Lmold formed of sections like those of theouter mold and provided with means for releasably locking them one toanother.

2. A mold for the purpose set forth, composed of a series of sectionseach comprising a frame provided with a facing and having on one endcatches with` guards crossing them and on the opposite end latches forreleasably engaging the catches to lock the sections one to the other,substantially as described.

CARL VEBER.

In presence ofn WALTER N. vWIYBERG, WV. B. DAvIEs.

IOO

